Veterinary pocket mouth-speculum.



PATENTBD APR. l0, 1906.

L. MCLBAN. Y VETERINARY POCKET MGUTH SPBGULUM.

APPLICATION FILED DEO.1. 1905.

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UNITE STATES PATET OFFIOF.

VETERINARY POCKET MOUTH-SIPECULUIV.

Specification of Letters Patent.

Patented April 10, 1906.

Application filed December l, 1905. Serial No. 289,859.

To all wil/0m 7225 may concern:

Be it known that I, LACHLAN MCLEAN, a citizen of the United States,residing at Brooklyn, in the county of Kings and State of New York, haveinvented new and useful Improvements in Veterinary Pocket Mouth-Speculums, of which the following is a specification.

This invention relates to a veterinary pocket mouth-speculum adapted foruse in making microscopic and digital examinations of the mouths andthroats of animals and also efficacious in administering medicine inball form.

The primary object of the invention is to provide a speculum of theclass set forth which can be reduced to compact form or folded andcarried in the pocket or rendered conveniently portable when not in useand capable of being quickly arranged for positively separating the jawsof animals.

Afurther object of the invention is to provide a mouth-speculum ofsimple and comparatively cheap construction wherein the parts are smoothand have such contour as to avoid injury to the mouth to which thespeculum is applied.

In the drawings, Figure 1 is a perspective view of a mouth-speculumembodying the features of the invention and shown expanded. Fig. 2 is aperspective view of the speculum shown folded or collapsed. Fig. 8 is afront view. Fig, 4 is a similar view of the device shown closed.

Similar numerals of reference are employed to indicate correspondingparts in the views.

The speculum is composed of two sections l and 2, which areapproximately of semielliptical contour and formed with knuckles 3 and 4at their inner ends, which are placed in coincidence and pivotallyconnected to provide hinged joints which are smooth and withoutinjurious projections. The sections l and 2 when connected provide aclear central opening 5, through the medium of which variousexaminations can be made with respect to the mouth and throat of ananimal. The curvature-of the side members of the sections l and 2 is ofsuch nature as to be effective in laterally expanding the walls of themouth without injuring any part of the latter or painfully annoying theanimal to be treated. Each section has an outer rest 6 integrally formedtherewith and longitudinally concaved or. depressed, the oppositeextremities of the rest projecting outwardly beyond the adjacentportions or side members of the sections. The one rest when the speculumis applied contacts with the roof of the mouth and the other with thelower jaw, the longitudinal concaved contour of the rests permitting abridging of the parts of the mouth with which they engage. When thespeculum is applied, the extremities of the rests projecting outwardlybeyond the side members of the sections are located close to the sidewalls of the mouth, and by thismeans the device will be retained in itsapplied position and resist the efforts of the animal to dislodge thesame.

The speculnum when applied is in folded condition, and after it has beeninserted within the mouth a sufficient distance the one section isopened with respect to the other and the expansion of the two sectionswhich results by the opening operation forces the jaws apart, holds thetongue down, and provides for unobstructed inspection or examination ofthe mouth and throat. When lthe speculum is removed, it is onlynecessary feature and which is due to the simplicity of the parts.

Having thus fully described the invention, what is claimed as new is- 1.A speculum of the class set forth involving hinged sections providedwith outer longitudinally-concaved rests.

2. A sp eculum of the class set forth involving hinged sections ofapproximately elliptical form to provide an unobstructed centralopening, the outer portions of the sections havinglongitudinally-concaved rests.

3. mouth-speculum of the classv set forth involvin hinged sectionshaving outer longitudina ly-concaved rests with extremities projectingbeyond the side members of the sections.

4. In a mouth-speculum of the class set forth, semi-elliptical sectionshaving their inner ends connected by hinge means and also IOO providedWith outer longitudinaily-eoneeved In testimony whereof I have hereuntoset rests With extremities projecting outwardly my hand in presence oftwo subscribing Wit- Io beyond the side members of the sections. nesses.

5. A mouth-speeuium of the class set forth 5 involving sections hingedat their inner eX- LACHLAN MCLEAN l tremities and provided Withprojections et Vitnesses: their outer portions extending beyond theHARRY E. CROWTHER,

side members of the sections. ALEX W. MCDONALD.

